The September 11, 2001, terror attacks orchestrated by al-Qaeda prompted the United States to declare a "War on Terror." When the Taliban government of Afghanistan refused to extradite al-Qaeda leader Osama bin Laden, an American-led coalition went to war with Afghanistan, overthrowing the Taliban government. America eventually captured and killed bin Laden, but the battle against the Taliban dragged on, while a war-torn and ravaged Afghanistan struggled to rebuild. Finally—20 years after the 9/11 attacks—American and coalition forces withdrew from Afghanistan, and the Taliban took back...